I would log in to "linux-tui", then just do some trial and error. Run command "vxconf" and increase your settings one step at the time. After each change, run "startx" to test the new settings. The limits of your video card (or your monitor) will eventually become evident. If you get a blank screen or just garbage, try key combination Ctrl-Alt-Backspace to kill X. You may even have to use the old three finger salute and reboot.

While a somewhat higher resolution and depth may work fine on your system it can sometimes mean that your system will run slower, especially on old hardware like yours. Your trial and error testing should include that. You may decide on a 16bpp depth rather than 24bpp, for example.

24 depth doesn't work at all, vxconf says that there was an error in the configuration IIRC.With 16 works fine but here is an issue: I selected 800x600 but when I run hardinfo to check the resolution it says 640x480. I check the /etc/xorg.conf and says 800x600.What's happening?

You might want to check if exists a better driver for your card than the one you are using now. The output of lspci can be useful to get the VGA chip and look for information. To know which driver you are using you need to look at your /etc/X11/xorg.conf

HTH

Logged

"There is a concept which corrupts and upsets all others. I refer not to Evil, whose limited realm is that of ethics; I refer to the infinite."Jorge Luis Borges, Avatars of the Tortoise. --Jumalauta!!

You might want to check if exists a better driver for your card than the one you are using now. The output of lspci can be useful to get the VGA chip and look for information. To know which driver you are using you need to look at your /etc/X11/xorg.conf

HTH

I've spent quite a while searching for a driver but couldn't find anything. The card is a Trident TGUI 9440-3.

After a while I arrived at a brazilean site that reminded me of using vesa instead of the generic trident driver.So I've made the change in xorg.conf and it worked! I got 800x600x16.

Now I have a problem with the refresh rates or frequencies, it isn't a serious issue but when opening windows or perhaps when moving the mouse, dots and lines appears on the screen and when the moving stops these dots and lines disappear.

I take another look at xorg.conf and see what i can do. Tips are welcome.

I looked up the specs of my monitor and the they are 30-54 KHz and 50-100Hz respectively. I made the modifications in /etc/X11/xorg.conf but nothing has changed. Should I put a range or a determined value? I've look at the xorg.conf man and it can be either but I'm afraid of damaging the monitor if start putting random values within those ranges. What would you recommend?

I have a range myself. And then I choose a rate in xfce.I guess you can try going for the maximum values, but I've never tried it.I think monitors don't get damaged by wrong inputs (maybe really old ones do). Mine displays a message that says "Input out of range" when I push it in some direction it doesn't like.